Saddlebag - recommendations please (DryBags?)

rjkflyer Posts: 102
edited November 2012 in Road buying advice
Am looking for the smallest saddlebag that can (just) accommodate the following:

1. Road tube
2. Levers
3. Two CO2 cylinders
4. Lezyne CO2 valve
5. iPhone
6. PVC gloves
7. Small multi-tool (Lezyne RAP6)

Sorry if this seems a daft Q but I'm going mad trying to actually unpick inside versus outside versus god-know-what dimensions from various websites, so figured I'd rather ask those who must have done same...

Am keen on the idea of Topeak Drybags - anyone tried them? And clip versus strap?